849966 has 32 divisors (see below), whose sum is σ = 1941408. Its totient is φ = 245760.

The previous prime is 849943. The next prime is 849967. The reversal of 849966 is 669948.

It is a Curzon number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 849966.

It is not an unprimeable number, because it can be changed into a prime (849967) by changing a digit.

849966 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1006 + ... + 1646.

It is an arithmetic number, because the mean of its divisors is an integer number (60669).

2⁸⁴⁹⁹⁶⁶ is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 849966, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (970704).

849966 is an abundant number, since it is smaller than the sum of its proper divisors (1091442).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

849966 is a wasteful number, since it uses less digits than its factorization.

849966 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 676.

The product of its digits is 93312, while the sum is 42.

The square root of 849966 is about 921.9360064560. The cubic root of 849966 is about 94.7255606774.

The spelling of 849966 in words is "eight hundred forty-nine thousand, nine hundred sixty-six".